Hello, I need help with modifying this code to use fstream to read through an external file named cowFiles.txt$,$ Open the source file, named Lab$2.$cpp with any editor you choose $($we are going to for now, you can use any editor you can find$).$ You can see that the program opens an input file to read data from each text line, however, the input file name is hard$-$coded, which means you cannot change the file name each time when you run this program. Now think about how to use command line arguments to pass the input file name as the argument instead of using hard$-$coded filename in the current source file, so that you can run your program in the following way:$ $./$Lab$2$ cowFiles.Txt $.$ here picture of lab$2.$cpp$.$

iles

then display how many cow files have

been used

Author: $($your name$)$

$/$

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